Measuring Device Leaf-Spring Conduction for Stable Assembly
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Solution Overview
Problem
Existing measuring devices face issues with assembly instability and electrical conduction defects due to the use of coil springs with diameters smaller than the assembly components, leading to potential deformation and interference during assembly.
Innovation Solution
A measuring device design featuring a cylindrical casing with a conductive member composed of a plate-shaped metal member, including an elastically deformable leaf spring portion, which contacts the inner peripheral surface of a hole to ensure stable electrical conduction and easy assembly by preventing interference during rotation or movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coil spring with diameter smaller than the assembly components is used, then electrical conduction is achieved, but assembly stability deteriorates due to movement and deformation during assembly
Solution Approach 1:
The patent changes the geometric parameters of the conductive member by designing it with a diameter equal to or larger than the hole diameter, and incorporates an elastically deformable leaf spring portion to enable parameter adjustment during assembly. This allows the conductive member to be inserted without interference while maintaining stable contact through elastic deformation.
Solution Approach 2:
The conductive member is designed with an elastically deformable leaf spring portion that can dynamically adjust its shape during assembly and operation. This dynamic flexibility allows the member to navigate assembly constraints while maintaining reliable electrical contact, resolving the contradiction between stability and conduction.
2Reliability
If a coil spring with diameter smaller than the assembly components is used, then electrical conduction is achieved, but assembly complexity increases due to potential defects and interference
Solution Approach 1:
By changing the diameter parameter of the conductive member to be equal to or larger than the hole diameter, and incorporating elastic deformability, the patent simplifies the assembly process. The member can be directly inserted without complex alignment or deformation maneuvers, reducing assembly complexity while ensuring reliable electrical conduction.
3Reliability
If the conductive member contacts the inner peripheral surface along a line or at a point, then electrical conduction is ensured, but force concentration increases on the contact portion
Solution Approach 1:
The patent utilizes the elastic deformability parameter of the leaf spring portion to allow the contact portion to yield under load. This elastic deformation distributes the contact stress over a larger area and prevents excessive stress concentration, while maintaining reliable line or point contact for electrical conduction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves a good assembling property and ensures reliable electrical conduction between the substrate and metal casing, preventing damage to the substrate and facilitating easy assembly by using a conductive member with leaf spring portions that maintain contact and alignment during assembly.
Implementation Method 1
the conductive member includes an elastically deformable leaf spring portion
Data Source
AI summary
A measuring device includes a metallic cylindrical casing, a cylindrical holder made of an insulator, a plate-shaped substrate, and a conductive portion that electrically connects a substrate and a casing. The casing has a first hole opened at one end. The holder is provided inside the first hole rotatably and movably along an axis of the first hole. The substrate is provided inside the first hole by being located adjacent to one end of the holder and fixed by the holder. The conductive portion includes a conductive member composed of a metal plate-shaped member. The conductive member includes an elastically deformable leaf spring portion, and the conductive member and the first hole are in contact with each other along a line or at a point.